(Z)-N-[2-(2-hydroxyethoxy)ethyl]-9-octadecenamide

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Not reported

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Data source

Reference

Reference Type:

publication

Title:

Unnamed

Year:

1976

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: A modification of the techniques described in Appraisal of the Safety of Chemicals in Foods, Drugs and Cosmetics, compiled by the staff of the Division of Pharmacology, Food and Drug Administration.

Deviations:

not specified

GLP compliance:

no

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Amides, C8-18 and C18-unsatd., N-(hydroxyethyl)

EC Number:

931-330-1

Molecular formula:

The alkyl chain length of the amide ranges between 8 and 18 carbon atoms

IUPAC Name:

Amides, C8-18 and C18-unsatd., N-(hydroxyethyl)

Test material form:

solid

Test animals

Species:

rabbit

Strain:

New Zealand White

Sex:

male/female

Details on test animals or test system and environmental conditions:

- Weight at study initiation: 1.9-2.7 kg

No further information avaialble.

Administration / exposure

Type of coverage:

occlusive

Vehicle:

unchanged (no vehicle)

Details on dermal exposure:

Prior to dosing, the trunk of each animal was clipped free of hair. Three of the animals (two male, one female) were further prepared by introducing epidermal abrasions over the clipped skin surface to enhance penetrability of the test substance through the stratum corneum. After test substance application the trunk of each animal was encased in a sleeve of plasticized material for 24 h. Following the 24 h exposure period the sleeve was removed and the skin sites gently cleansed.

Duration of exposure:

24 h

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

3

Details on study design:

All animals were observed daily thereafter for 14 d for mortality, skin response and general behavior.

Results and discussion

Preliminary study:

Not applicable

Effect levels

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Mortality:

No mortalities observed

Clinical signs:

All animals appeared normal through Day 14.

Body weight:

Two females that had abraded skin lost weight (0.01 and 0.25 kg) over the 14 d post-exposure period. All remaining rabbits gained weight through Day 14.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

Under the study conditions, the acute dermal LD50 in rabbit was found to be >2,000 mg/kg bw.

Executive summary:

A limit test was conducted to determine the acute dermal toxicity of the test substance to albino rabbits. Three male and three female rabbits were administered a single dose of the test material at a level of 2000 mg/kg bw. Prior to dosing, the trunk of each animal was clipped free of hair. Three of the animals (two males and one female) were further prepared by introducing epidermal abrasions over the clipped skin surface to enhance penetrability of the test substance through the stratum corneum. After test substance application, the trunk of each animal was encased in a sleeve of plasticized material for 24 h. Following the exposure period, the sleeve was removed and the skin sites gently cleansed. All animals were observed daily thereafter for 14 d for mortality, skin response and general behavior. All animals survived and appeared normal through to Day 14. Two females that had abraded skin lost weight over the 14 d post-exposure period. All remaining rabbits gained weight. Under the study conditions, the acute dermal LD50 in rabbit was found to be >2,000 mg/kg bw (Palanker, 1976).